Unit 1 第1课时 词汇-2022-2023学年八年级英语下册同步精品课堂（牛津上海版）

Trees 牛津上海版 英语 八年级 第二学期 Unit 1 Episode 1 A：高台跳水 牛津上海版 英语 八年级 第二学期 第1节 本节课讲解词汇部分 2 Ⅰ. Words. 1. fighter 斗士；战士 e.g. She won't give up easily; she's a real fighter. 她不会轻易放弃的，她是一个真正的斗土。 Doctors and nurses are disease fighters. They always fight against all kinds of diseases. 医生和护土是与疾病斗争的战土。他们总是和各种疾病作斗争。 When the police came, the fighters ran away. 警察到来时，斗殴的人溜走了。 Words and expressions 【知识拓展】 fight n. 打架，战斗，斗志 e. g. The two boys had a fight. 两个男孩打了一架。 fight v. (fought; fought)（常与against，with连用）打仗；战斗 e. g. People often have to fight with the enemy. 人们往往不得不抗击敌人。 3. pure adj. 纯的，纯粹的，纯净的 e.g. The water in mountain rivers is usually pure. 流经山间的河水通常是纯净的。 She speaks pure French. 她讲一口纯正的法语。 2. suppose v. 推想，假设 e.g. Scientists supposed that large dinosaurs lived in swamps. 科学家们猜想大型恐龙栖居于沼泽地中。 Suppose your father saw you now, what would you say? 假设你父亲现在看到了你，你该怎么说？ 5. gas n. 气体 e.g. There are several kinds of gas in the air, with nitrogen amounting to the most part. 空气中有好几种气体，氮所占的比重最大。 4. natural adj.自然的，自然界的 e.g. It is natural for a cat to catch mice. 猫捉老鼠是本能。 Fire is one of the natural elements in nature. 火是自然界中的自然元素之一。 【知识拓展】 nature n. 自然，自然界，大自然 e.g. This phenomenon is unique in nature. 这种现象在整个自然界是罕见的。 6. release v. 释放，解放 e. g. I released the horse and it ran away. 我放了这匹马，让它跑了。 Four prisoners were released. 四名犯人被释放了。 【知识拓展】 release n. 释放；解脱 e.g. She can expect an early release from prison. 她有望早一点儿出狱。 7. chemical n. 化学物质，药品 e.g. The farmers use chemicals to kill the insects in the fields. 农民用化学药品来杀死地里的害虫。 【知识拓展】 chemical adj. 化学的 chemistry n. 化学 chemist n. 化学家，药剂师 8. nasty adj. 令人厌恶的，令人不悦的 e.g. There's a nasty smell coming from that sewer. 下水道里发出一股很恶心的味道。 Don't be so nasty! 不要发脾气啦！ 9. communicate v. 沟通，通信 e.g. My net-pal and I communrcate with each other on the Internet. 我和我的网友通过网络保持联系。 The Minister for Foreign Affairs has already communicated on this event with the American President. 外交部长已经跟